End-play device.



O. A. FISCHER. mm PLAY DEVICE.

APPLICATION FILED 001214, 1911.

1 023 245 Patented Apr. 16, 1912.

WITNESSES? q WVEN Q mrrvma N E;Y..

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UNITED. STATES, PATENT OFFICE.

CHARLES A. FISCHER, OF CHICAGO, ILLINOIS, ASSIGNPR TO ALLIS-CHALMERfiCOM- PANY, OF MILWAUKEE, WISCONSIN, A. CORPORATION ()1? NEW JERSEY.

ENID PLAY DEVICE.

Specification of Letters Patent.

I Patented Apr. 16, 1912.

Application filed October 14, 1911, Serial No. 654,719.

To all whom it may concern.

Be it known that I, CHARLES A. FISCHER, a citizen oi the United States,residing at Chicago, in the count of Cook and State of Illinois, haveinvented a certain new and Useful Improvement in End-Play Devices, ofwhich the following is a specification.

This invention relates to improvements in the construction. of end-playdevices for im parting end motion to rotating shafts, and isparticularly applicable to the shafts or crushing rolls, dynamos or likeapparatus.

The object of the invention is to provide a meansfor imparting end playor motion to a rotating shaft, which is simple in eonstrucv tion andefficient in operation. a

In the use of end play devices on the shafts of crushing rolls, it isnot desirable to have the relative reciprocation between the rolls occurat frequent intervals, the desired rate of relative reciprocation beingapproximately once in twenty minutes for ordinary classes of work.

With this requirement as a basis, it is the object of the presentinvention to provide an end play device or means for shifting the shaft,which will give a very slow lateral reciprocation to a rotating shaft.

A clear conception of an embodiment of the invention can be had byreferring to the drawing accompanying and forming part of thisspecification, in which like reference characters designate the same orsimilar parts in the various views.

Figure l is a central vertical section through an end play deviceshowing eaiue applied to a fragment of the frame. Fig. :2 a transversevertical section through an end play device, inclosiug casing thereofbeing partly broken away. Fi is an enlarged side view, partly insection, oi partof the mechanism forming the means for impartingreciprocating motion to a shaft.

The shaft 1, which may be that oi? either a dynamo, crushing roll, orother similar machine, supported in hearings formed in the frame 2, afragment of which is shown. The gear 4 fastened or secured directly tothe shaft 1 and meshes with a gear 16 which is rotatahly mounted on theoverlmngiug end of a stationary countcrsha'l't projecting outwardly fromthe frame member 3. A. second counlersha'll, which carries the l6, l9.fixed to it at either oii its ends, is adapted For rotation witnin theframe memos. a.

Ihe gearflS at one end of the second counter shaft meshes with the gear16, While the gear 19 at the opposite end of the second countershaftmeshes with a gear 15 which 15 free to rotate upon a stationarycountershaftprojecting outwardly from the frame 3. The sleeve 20surrounds the end of the shaft 1 and is prevented from displacementlongitudinally of the sleeve axis by means of outwardly projectingthrust collars 8 formed hitegral with and projecting outwardly from thesleeve 90. The thrust collars 8 ooact in corresponding circular groovesformed in the frame member 3 and cap 7. The gear which is secured to thesleeve 20, meshes with the gear 1.5 which gear is adapted to rotate onthe stationary countershaft which projects from the frame The frame 3 isstationarily supported by means of standarus 17 which project away fromthe frame 2. The casing 6, which is. formed of sheet metal, is alsosupported by the standards I? and iucloscs'the mechanism carried by theend of the shaft 1. I i

It should he noted that the construction of the various gears should hesuch that the gear l: contains a greater number of teeth than the gear5. The gear 16 should contain less teeth than the gear 15, while thegear 18 also should contain less teeth. than the gear 19., the pitch ofall those gears, however. being: the same. It should also be noted thatthe gear l6 of somewhat pgroa Width than the Sears 4, 1th. 'lhe relativenumhcr of teeth of the various gears is, however, dependent" upon therelative motion desired between the shaft and frame and will vurv Fordifferent this s of apparatus.

lhe shaft l has a circuhir groove or rej'ioriuod therein some dista.short of its end, thus providing an eula ed portion ll which projectsoutwardly in the form of circular flange. A two-piece disk 1.0 pro jectsinwardly into the groove or recess tornuwl in the shait l and is securedto the sleeve 20. One of the surfaces of the disk l0 is foru'iedperpendicular to the axis of the sleeve and shaft 1 and is adapted tocoact against an end surface of the shaft 1. The opposite surface oilthe disk 10 is formed at an angle to the axis of the shaft and sleeveand approaches the enlarged portion ll at one side thereof, see Fig. 3.,he dish in which incloses the outer sleeve 20, also has an angular laceformed on its side ada "surfaces formed on the disks 10, 12.

cent the end of the shaft 1, this angular surface being parallel to theangular surface of the disk 10.

Cylindrical blocks or members 13 are 5 formed with stub ends which coactin a hole formed through/the flange portion 11. The outer extremities ofthe members 13 are provided with semispherical recesses in which thebuttons or hemispheresl lcoact, see Fig.

The outer plane surfaces of the l1emispheres 14 coact with the parallelinclined The longitudinal distances between corresponding points on theplane surfaces of the hemi- 5 spheres 14 are approximately equal to theDuring the operation of the device the main shaft 1 is rotated by anysuitable means not shown. The rotation of the shaft 1 is transmittedthrough the gear to the gear 16, from the gear 16 through the gear 8 andco'untershaft to the gear 19. from which the motion is further transmitted through the gear to the sleeve through the gear 5. Theproportioning of the number of teeth of the various gears is such thatthere will be a slight difference in the relative numbers of revolutionsmade by the shaft 1 and sleeve 20, and a slight relative angularadvancement between the parts for one revolution. This proportioning ofthe number of teeth in the gears for crushing rolls might, for example,be such that during twenty-one hundred revolutions of the sleeve 20, theshaft would make two thousand and ninety nine revolutions or vice versa.As the shaft 1 and sleeve 20 shift angularly relative to each other, itwill be noted that the hemispheres 14c and blocks 13 which are carriedby the shaft 1 will change their relative positions along. the

angular surfaces formed on the disks 10,

12 of the sleeve 20. This changing of the relative position of thehemispheres 14: causes the shaft 1 to move longitudinally within thesleeve 20 and relative to the frame 2-. In the position shown see Fig.1, the shaft 1 is to the extreme left position of its travel. As thehemispheres 14: ap; preach the upper portions of the angular surfaces inthe position of the elements as shown in Fig. 1, the shaft 1 approachesa po sition to the extreme right within the sleeve 20. During theangular shifting of the shaft 1 within the sleeve 20, the member 13adjacent the disk 10 rolls upon the portion of the shaft 1 havingsmallest diameter and also upon the adjacent cylindrical surface formedon the interior of the sleeve 20. The member 13 adjacent the disk 12rolls upon the cylindrical surface formed on the interior of the sleeve20. Since the hemispheres 1 1- which connect the members 13 with theparallel angular surfaces, have spherical. bearings, they can adjustthemselves to any angular position which they may be called upon to takedue to the angular advance of either of the members.

It will be noted that by proper proportioning of the driving gearsbetween the shaft 1 and sleeve 20, the rate of reciprocation of theshaft 1 within the sleeve 20 can be varied to any desired degree. Sincethe sleeve 20 is locked against longitudinal movement. by the thrustcollars 8 co-acting within the member 3, the motion of the shaft 1 mustbe relative to the frame 2, thus giving the members carried by theshafta reciprocating motion in addition to the ro tary motion thereof.

It should be understood that it is not desired to be limited to theexact details of construction shown and described, for obviousmodifications will occur to a person skilled in the art.

It is claimed and desired to secure by Letters Patent,

1. In an end play device, a rotary shaft,

a sleeve adjacent said shaft, means for rotating said sleeve at adifferent speed from that of said shaft, means for preventing axialdisplacement of said sleeve, and means between said shaft and saidsleeve and no acting with said mean for rotating said sleeve to movesaid s aft longitudinally relative to said.sleeve.

2. In an end play device, a rotary shaft, a sleeve around said' shaft,means for rotating said sleeve with said shaft and at aditi'ercntfispeed, means for preventing axial displacement of saidsleeve. and means be tween. said shaft and said sleeve and coacting withsaid means for rotating said sleeve to reciprocate said shaft withinsaid, sleeve.

3. In an end play device, a rotary'shaft member, a sleeve member aroundsaid. shaft member, one of said members having a cam surface formedthereon, means for rotating said members at different relative speeds,means for preventing axial displacement of one of said members, andmeans between.

said members and coacting with said cam surface and with said. means forrotating said members to reciprocate one of the mcmhers relativeto theother.

t. In an end play device, a rotary shaft member, an abutment memberadjacent said. shaft member, one of said members having a plane surfaceinclined relative to the axis of said shaft member and located oppositean end surface of the other of said members, means for rotating saidmembers at different relative speeds, means for prev'enting'axialdisplacementof one of said members, means between said Opposed surfacesfors'pacing said members, said spacing means including a sphericalsegment the plane surface of said spherical segment being slidable onsaid inclined-surface, and means for axially moving one of said membersso as to cause said spacing means to maintain contact with said opposedsurfaces.

5. In an end play device, a rotary shaft member, anabutmentmemberadjacent said shaft member, one of said members having a plane surfaceinclined relative to the axis of said shaft member and located oppositean end surface of the other of said members, means for rotating saidmembers at different relative speeds, means for preventing axialdisplacement of one of said members, means for spacing said members,said spacing means comprising a spherical segment, the plane surface ofsaid segment being slidable on said inclined surface, a member rotatableon an axis eccentric to said shaft axis and recessed for coaction withthe spherical surface of said segment, and means for axially moving oneof said first members so as 1 to cause said spacing means to maintaincontact with said opposed surfaces.

In testimony whereof, the signature of the inventor is afiixed hereto inthe presence of two Witnesses.

CHAS. A. FISCHER.

Witnesses:

THOMAS A, DALEY,

J. M. GERAGHTY.

